Home / 4-6-2.57

Finding the Fourth Proportional to 4, 6 and 2.57

Calculator

Solution

The fourth proportional to 4, 6 and 2.57 is: 3.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4 : 6 = 2.57 : x
  2. Step 2: Convert to fraction form
    4/6 = 2.57/x
  3. Step 3: Cross multiply
    4x = 6 × 2.57
  4. Step 4: Simplify right side
    4x = 15.42
  5. Step 5: Solve for x
    x = 15.42/4
  6. Step 6: Final answer
    x = 3.86

Related Problems

Find fourth proportional to 2, 3 and 1.29
Half scale
Find fourth proportional to 8, 12 and 5.14
Double scale
Find fourth proportional to 5, 7.50 and 3.57
Similar ratio
Find fourth proportional to 6, 9 and 3.86
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.